(function (window, document) {
  var Print = function (dom, options) {
    if (!(this instanceof Print)) return new Print(dom, options);
    this.options = this.extend(
      { noPrint: '.no-print', onStart() {}, onEnd() {} },
      options,
    );
    if (typeof dom === 'string') {
      this.dom = document.querySelector(dom);
    } else {
      this.dom = dom;
    }
    this.init();
  };
  Print.prototype = {
    init() {
      const content = this.getStyle() + this.getHtml();
      this.writeIframe(content);
    },
    extend(obj, obj2) {
      for (const k in obj2) {
        obj[k] = obj2[k];
      }
      return obj;
    },
    getStyle() {
      let str = '',
        styles = document.querySelectorAll('style,link');
      for (let i = 0; i < styles.length; i++) {
        str += styles[i].outerHTML;
      }
      str +=
        `<style>${
          this.options.noPrint ? this.options.noPrint : '.no-print'
        }{display:none;}</style>`;
      return str;
    },
    getHtml() {
      const inputs = document.querySelectorAll('input');
      const textareas = document.querySelectorAll('textarea');
      const selects = document.querySelectorAll('select');
      for (const k in inputs) {
        if (inputs[k].type == 'checkbox' || inputs[k].type == 'radio') {
          if (inputs[k].checked == true) {
            inputs[k].setAttribute('checked', 'checked');
          } else {
            inputs[k].removeAttribute('checked');
          }
        } else if (inputs[k].type == 'text') {
          inputs[k].setAttribute('value', inputs[k].value);
        }
      }
      for (const k2 in textareas) {
        if (textareas[k2].type == 'textarea') {
          textareas[k2].innerHTML = textareas[k2].value;
        }
      }
      for (const k3 in selects) {
        if (selects[k3].type == 'select-one') {
          const child = selects[k3].children;
          for (const i in child) {
            if (child[i].tagName == 'OPTION') {
              if (child[i].selected == true) {
                child[i].setAttribute('selected', 'selected');
              } else {
                child[i].removeAttribute('selected');
              }
            }
          }
        }
      }
      return this.dom.outerHTML;
    },
    writeIframe(content) {
      let w,
        doc,
        iframe = document.createElement('iframe'),
        f = document.body.appendChild(iframe);
      iframe.id = 'myIframe';
      iframe.style = 'position:absolute;width:0;height:0;top:-10px;left:-10px;';
      w = f.contentWindow || f.contentDocument;
      doc = f.contentDocument || f.contentWindow.document;
      doc.open();
      doc.write(content);
      doc.close();
      this.toPrint(w, () => {
        document.body.removeChild(iframe);
      });
    },
    toPrint(w, cb) {
      const _this = this;
      w.onload = function () {
        try {
          setTimeout(() => {
            w.focus();
            typeof _this.options.onStart === 'function' &&
              _this.options.onStart();
            if (!w.document.execCommand('print', false, null)) {
              w.print();
            }
            typeof _this.options.onEnd === 'function' && _this.options.onEnd();
            w.close();
            cb && cb();
          });
        } catch (err) {
          console.log('err', err);
        }
      };
    },
  };
  window.Print = Print;
}(window, document));
